RE: [Ecrit] Hiding (partial) locations

["Stark, Barbara" <Barbara.Stark at BellSouth.com>]

The way I envisioned partial locations, from my civic location bias, is
to provide city, county, and state information. I'm not aware of cases
where a city is sub-divided, so a provider in that situation would have
to figure out the information needed to uniquely map for emergency
services.

But I know that around me, cities (incorporated areas) and counties
(unincorporated) have responsibility for services within their borders.
In some cases the counties provide service to cities by agreement.

City boundaries do meander around, and split streets in half. But I'm
not aware of cases where a city has told its residents to call another
city for emergency services. Cities are responsible to the citizens
within their borders, no matter how twisted those borders might be. The
same goes for counties.
Barbara

-----Original Message-----
From: Brian Rosen [mailto:br at brianrosen.net] 
Sent: Monday, April 16, 2007 2:57 PM
To: 'Henning Schulzrinne'
Cc: 'ECRIT'
Subject: RE: [Ecrit] Hiding (partial) locations

I don't understand this.

If, in order to make a route decision, you need street name and house
number, but the access network wishes to hide location from non
emergency use cases, how the heck do we supply "coarse" location that is
any different from full LbyV?

You can't restrict the access network from hiding location ONLY IF the
PSAP boundary is truly coarse.  I'm also not so sure the access networks
would be willing to give out coarse location down to, say, city.

So, I guess I disagree this is a fair trade-off.  In fact, I think it's
a non-starter.

Brian

> -----Original Message-----
> From: Henning Schulzrinne [mailto:hgs at cs.columbia.edu]
> Sent: Monday, April 16, 2007 1:15 PM
> To: Brian Rosen
> Cc: 'ECRIT'
> Subject: Re: [Ecrit] Hiding (partial) locations
> 
> 
> On Apr 16, 2007, at 11:19 AM, Brian Rosen wrote:
> 
> > This doesn't work in areas that don't have simple PSAP boundaries.
> 
> Agreed; it would require more precise location in those jurisdictions.

> Those do seem to be the exception, however.
> 
> >
> > Even in a case where the PSAP serves a city, the boundary of the 
> > city is very often not exactly that of the municipal boundary.
> 
> Again, this would only force an ISP to provide more precise location 
> information to those relative handful of exception cases. This seems 
> like a fair trade-off.
> 
> >
> > It definitely doesn't work in the U.S. where there are PSAP 
> > boundaries that are one side or the other of the street (even and 
> > odd addresses), or between two house numbers on a street.
> 
> My perception is that PSAP boundaries that don't correspond to 
> community or county names occur, but only affect a tiny fraction of 
> the population.
> 
> (Street don't matter. Broad Avenue, for example, traverses a half 
> dozen communities in northern Bergen County, but each town has its own

> PSAP, whose responsibility is defined by the community, not the
> street.)
> 
> 
> >
> > Brian


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